Communication apparatus



March 7, 1944. c. R. DOTY COMMUNICATION APPARATUS 4 Filed June 17, 1943 5 sheets-sheet' 1 F IG. 3.

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March 7, 1944.` c. R. Dow

COMMUNICATION APPARATUS Filed June 17, 1945 5 Sheets-Sheet 4 R76 W68 BY I VENTOR TTORNE Y March 7, 1944. C, R DOTY COMMUNICATION APPARATUS Filved June 17, 1943 5 Sheets-Sheet 5 FIG. 9B.

Patented Mar. 7, 1944 COMMUNICATION APPARATUS Charles IB. Doty, Yonkers, N. Y., signor to Inonal Business Machin es Corporation,

New York, N. Y., a corporation of New York Application June 17, 1943, Serial No. 491,102

1 Claim.

This invention relates to apparatus used in reproducing records having data represented thereon in so called statistical code, through telegraphic channels operating on a telegraphic code,.that is, a code which uses most or all of its signals to convey either of two different meanings. The different meanings are grouped into two classes and the single meaning intended is indicated by preceding a group of signals of the same class with one or another of two key signals. Usually the two meanings of the signals are classified as letters and figures the first class being composed of the alphabetical characters and the second including the ten digits and the punctuation marks. In ordinary telegraph work the signals are translated into printed characters at the receiving end by a printer having the letters characters in a lower case and the figures characters in an upper case. `The above mentioned key signals cause the printer to shift from one case to the other; that is, theflgures shift signal causes the printer to shift to figures case, where it remains (except for a condition to be mentioned presently) until a lettersl shift key signal causes it to shift back to letters case. The exception noted is where a printer shifted to figures case receives a space signal. Because of the fact that single punctuation marks, requiring a shift to figures case, occur frequently in the body of alphabetical text, the printers are sometimes constructed so as to drop into letters case in response to a space signal, so that the space signal which invariably follows a. punctuation mark, in alphabetical text, will return the printer to letters case.

The patent applications of C, R. Doty, Serial No. 446,877, filed June 13, 1942; C. R. Doty and E. J. Rabenda, Serial No. 449,445, filed July 2, 1942 and A. W. Mills and E. J. Rabenda, Serial No. 456,248, led July 9, 1942 describe apparatus, which can be used in conjunction with commercial telegraph apparatus employing a telegraphic code of the kind described, to reproduce or duplicate, at a remote point, records bearing data in statistical code. The duplicating apparatus described in the above identified applications includes, at the sending station, a record sensing mechanism which detects the change of the characters sensed, from letters to figures and from figures to lettersj and inserts the appropriate key signal at each change. At the receiving station the reproducing mechanism responds to the key signals by a shift of its translating means, whereby the telegraphic code signals cause the reproducing mechanism to pro- 'duce letters characters following a letters figures condition until, at the sending station, a change to letters characters is detected by the sensing mechanism, or at the reproducing station, a.letters signal is received. The occurrence of a space on the original record, or the reception of a space signal by the reproducing mechanism, has no effect upon the control means. Thus, if a. space occurs between two groups of figures characters, no figures key signal is given following the space, yet the reproducing mechanism correctly continues to record llgures" characters in the second group.

It is frequently desirable to make a printed record at the receiving station, of the matter to be duplicated in statistical code. The printer used for this purpose may be of the type which unshifts to letters case in response to a space signal. If such a printer were operated by a. telegraphic code sequence produced under control of a sensing unit as described in the above mentioned applications of Doty, and Mills and Rabenda, the prnter'would print letters characters, instead of the desired figures characters, in response to signals following a space between two groups of figures characters read from a statistical' code record.

It is the primary object of the present invention to provide a mechanism capable of converting data recorded in statistical code, into a telegraphic code sequence, which will correctly operate a printer that shifts to letters case in response to a space signal, and which will also correctly operate a. duplicating apparatus to reproduce the original record in statistical code.

Other objects of the invention will be pointed out in the vfollowing description and claim and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. l is an outline plan View of a record sensing unit and a ,tape perforating unit interconnected for operation in accordance with the invention.

Fig. 2 is a face view of a portion of 'a record card illustrating the Hollerith code.

F ig. 3 is a view of a fragment of tape illustrating a five point telegraphic code.

Fig. 4 is a fragment of a record card showing an example of data recorded in Hollerith code.

Fig. 5 is a fragment of tape showing the same data perforated in telegraphic code.

Fig. 6 is a vertical section through a portion of the record sensing unit. y

Fig 7 is a rear elevation of a portion of the record sensing unit, showing the escapement mechanism.

Fig. 8 is an isometric projection of the tape perforating unit.

pensed with and Figs. 9a and 9b are two parts of a wiring diagram,l to be positioned in vertical sequence.

Fig. 10 is a timing diagram.

In the illustrative embodiment of the invention shown in the drawing the telegraphic code sequence into which the statistical code data. from the original records is translated is recorded on a tape, which can then bev handled in the usual way in a tape controlled transmitter. The step of recording on a tape may, however, be dis`-" 10 vidual translating relays of the group RR, RX,'

R0, 'RI-R9. (see Fig. 9a), which relays are controlled selectively in accordance with the sensed data designations on the record cards. A plurality of control relays RID-RH are connected to certain ones of the translating relays so as to be controlled selectively, in accordance with the data sensed on the cards.

The individual translating relays are provided with groups of translating contacts (see Fig. 9b) connected in cascaded relationship, which contacts. in turn, are connected to the common conductors SII-SI5. The said translating relays and associated contacts are effective to translate the data designations sensed in statistical code to the five-unit telegraphic code (Fig. 3), and, accordingly, control selectively the energization of the punch magnets 29|) in various code combinations, thereby causing the code designating perforations representing the datav sensed on the record cards to be punched in the telegraphic tape 200 (Fig. 5).'

In order to distinguish the code designations in the telegraphic tape as alphabetical or numerical data, a plurality of supervisory circuits are provided, which circuits are selectively controlled by the said control relays. The said supervisory circuits include the relays RIS-RIS punch cycle. Under these conditions, the said 'conditioned relays RIS-RIS and associated circuits cause the punch unit to operate two cycles,

so that during the first cycle the, appropriate key signal is recorded, and during the second cycle the said character signal is recorded.

Whenever a blank column is detected in the cording numerical characters, when a blank column is sensed on the record card, the said control relays will be restored to their normal condition. Thus, the next character sensed on the record card, whether it be alphabetical or nu- (Fig. 9a), which relays are conditioned selectively in order to supervise .the tape punching operations. Whenever, alphabetical data are sensed on the record cards, relays RIS-Ris and their associated circuits are conditioned to cause the punch to record a letters key signal vpreceding,

thedata designations representing the alphabetical data, and whenever numerical data are sensed the said relays and circuits are conditioned to cause the punch to record a gures' key signal preceding the numerical data designations. A single key signal preceding a group of successive signals representing characters of the same class is suiiicient; it is not necessary to precede every character by' a keysignal.

The tape punch unit is operated in a startstop manner, under control of a clutch magnet 280, and` normally records one character signal each cycle. However, when the control relays RIS-RIS are in their normal condition, or whenever a change from alphabetical to numerical characters, or vice versa, issensed in the record cards, the sensed data is stored in the said translating relays during a preliminary merical, will cause an appropriate key signal to be perforated in the tape, preceding the perforation lof the character signal. If it is a figures key signal, it will return the printer to figures case, before the next character is recorded. If it isa letters" key signal, the letters shift means of the printer will operate without effect, because the printer will have been shifted to letters case by the space signal. The control of the duplicating punch at the receiving station-will be different from that of the printer, but the punched record will conform to the printed record. Since the space signal will not affect the control relays of the duplicating punch, a figures key signal will not alter their condition, which will hold over in gures condition, according to the example described. On the 'other hand, a letters key signal, following a fspace signal will transfer the control relays of the duplicating punch to letters condition, before the next character is perforated in the duplicate record card.

Control record Referring now to Fig. 2, the control record is shown to comprise a well knowntabulating machine record card, generally designated C, of the type commonly used in the Hollerith electric tabulating systems. Diiferentially positioned control representations, such as perforations 9, are used to represent the Various characters composing the data. The perforations are differentially, positioned in various columns of the record card, and by the differential positioning thereof different significations are imparted thereto. The letters of the alphabet are designated by pairs of perforations, each perforation of a pair being located in one of the twelve index point positions of a column.

The Hollerith character code shown in Fig. 2 is an arbitrary one and different well known codes which have been used in statistical systems may be employed in the present recording system. It Will be noted by reference to the said code in Fig. 2 that the alphabet is divided into three groups. The letters of the first group A to I are designated by diierent combinations of a perforation in the R" index point position with perforations in the one to nine index point positions. The letters of the second group J to R are designated by perforations in the X'po sition in combination with perforations in the one to nine positions, while the letters of the third group S tov Z are identified by combinations of a perforation with perforations in two to nine index point positions. The individual numerical characters are represented by a single perforation in the corresponding zero to nine index point positions. The record cards may have as many columns for the reception of the data designating perforations as may be desired. The description to be set forth hereinbelow relates to mechanism commonly used in tabulating systems employing the standard eighty column record card.

Record sensing unit- Record card feeding means-Referring to Fig. 1,Y the record cards C'to be sensed or analyzed are placed in a magazine designated I0, from which they are advanced singly by means of a picker I I `toward the left, to present their first column to a card sensing posltionabove the sensing brushes designated I2 (Fig. 6). In this position, th reciprocable card carriage comprising a pusher i3 and a forward guide I4 engages the card and advances it, step by step, under control of the escapement mechanism to be described later. Pusher I3 and guide I4 are carried by an escapement rack l5 and the picker knife il is carried by a rack bar I6. 'Rack I5 has a gear il' meshing with its lower edge (see Fig. 6) and bar I6 has a gear i8 meshing with its upper edge, both gears being rigidly mounted on a cross shaft I9 (Fig. 2.). Due to this connection between the elements, the movement of picker II toward the left, as viewed in Fig. 1, is accompanied by movement to the right of pusher I3 and forward guide i4. At the comv mencement of operations, the picker and pusher are in the position shown in Fig. l.

The rack IE is provided with a finger piece 2li at its right hand extremity by means of which the rack i6 and the picker lI may be moved toward the left to feed a card from the magazine I Il. This movement is accompanied by movement of the pusher I3 in the opposite direction. the parts being so proportioned that, when the card has been advanced to present its rst column to the sensing brushes i2, the pusher I3 will have moved toward the right sufficiently to engage the right hand, or trailing edge of the card, and will now control the further advancement thereof in response to the operation of the escapement mechanism.

The operation of card feeding just outlined is more fully xpnined in Patent 1,772,186

granted to F. L. Leeget al. for a duplicating punching machine. The escapement mechanism referred to is of the same general nature as that disclosed in the Schaaff Patent 1,426,223 and a brief description thereof will now be given.

Escapement 'means-When the card is in position above the sensing brushes I2 (Fig. 6), further advance is controlled by the escapement mechanism which, in turn, is responsive to the energization of escape magnet 40. Upon energization of magnet 4G, its armature 4I will be rocked about a pivot in a clockwise direction and through a screw 42 secured to an arm 43a projecting from a` rockably mounted rod 43, will rock the rod 43 counterclockwise against the tension of a spring 44. The rod 43 is rocked as an incident to each spacing operation and has secured to one end thereof opnositely extending arms 45, 46 (see also Fig. 7). Arm 43 is provided with a laterally extending pin 46a for engagement with an enlarged opening in a stepi ping dog 41, which is loosely pivoted on rod 43.

the

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Opposite arm 46 is provided with a pin 45u extending into a slot formed in the locking dog 48. When rod 43 is rocked, arm 48 will, through its pin and slot connection with dog 4l, lift the latter out of one of the notches of the rack I5 and at the same time arm 45 will depress locking dog 48 into a notch between the rack teeth. At this time a spring 4! advances the loosely pivoted dog 41 a short distance just sufficient to permit this dog to move above the top of the next tooth. When the locking dog is again raised, stepping dog 4l, due to the movement of rack I5, will ride down along the next tooth until it strikes the end thereof and the carriage is thereby arrested. The usual spring drum (not shown) is provided to bias the rack I5 toward the right, as viewed in Fig. 7. The detailed structure in this dog and rack arrangement is well known and need not be further described, and it is sufiicient to note that 'for each operation of the escape magnet 40, the rack I5 is advanced one step or tooth, carrying with it the pusher I3 and forward guide I4, so that the card is likewise advanced one step.l each. step of advancement being coextensive with the spacing of the columns of the card.

Also in Fig. 7 are shown the floating cam contacts I49, one blade of which is shifted by an arm |50 which is loosely pivoted on the rod 43 and which has a lateral extension resting upon the upper edge of the stepping dog 4l so that during escapement from one column to another, the incidental raising of the stepping dog 4l, through arm I50 will open the contacts 44S during the period that the dog is raised.

Record card sens-ing means-The card sensing brushes I2 are shown in Fig. 6. There are provided twelve of these brushes positioned 'side by Qside, there being one for each of the usual twelve rows of index point positions of the card. The brushes I2 are mounted in an insulating brush holder 80 so as to Contact the card and effect electrical connections through the perforations therein with a common contact roller 9i.

Perforated telegraphic vtape Referring now to Fig. 3, a tape 2W is shown provided with successive transverse rows of perforations 20I arranged in accordance with the well known five-unit telegraphic code, usually referred to as the Baudot or Teletype code. In a. five-unit code only thirty-two possible combinations are available, and, as mentioned hereinabove, for this reason, it is necessary to ernploy the same code combinations to represent the alphabetical characters, and the numerical and .other characters.

In order to distinguish the alphabetical characters from the other remaining characters, for telegraphic transmission purposes, a sequence of alphabetical signals is always preceded by a letter shift signal and a sequence of the other y remaining character signals is preceded by a blan'k in column 4 restores the control relays RIS-RIS and the associated circuits to their normal condition, therefore the sensing of a numeral designation in column 5 of the record card will cause a gure shift signal to be perforated in the tape, preceding the second 9 signal. The way in which these operations are performed will be described in detail later.

Tape perforating unit Referring now to Fig. 8, the perforating apparatus is shown to include individual punch ele. ments 2|0, one for each of the five units of the telegraphic code, plus an additional one to punch feed holes. The punch elements coact with a common die block 2 Il and are slidably arranged formed on a shaft 220 is located within the bows of yoke portions 2|8 of the adjacently arranged levers, to support and oscillate the said` levers. Normally, during the rotation of the eccentric, the levers are moved downward and upward by the supporting eccentric, about the pivotal connections formed by the ends of the levers engaging the recesses of the related punch elements. Under these conditions the free right ends of the levers are rocked, first down and then up.

An individua] pivoted latch 222 provided for each actuating lever is formed near its lower end with a pair of spaced latching fingers 224, disposed `in close proximity to, but normally held out of the path of the normally free ends of the actuating levers, by a spring (not shown).

Whenever it is desired to operate a punch element 2|, the related latch arm is rocked in a clockwise direction, so that its latch ngers 224 .engage and latch the free end of the related actuating lever. The shaft 220 is normally stationary, being latched by afdetent 214 engaging the releasing a'rm 213 of a one revolution clutch mechanism 210. The detent 214 is operated by the punch magnet 280, momentary energization of which will release the detent from the arm 213 and allow the clutch to couple the shaft 220 to the constantly rotating shaft 218 of a punch motor 28| (Fig. 9a). The magnet 280 is deenergized immediately after the arm 213 is released, to allow the detent to return (under the pull of a spring, not shown)v to position to engage the arm 213 after one revolution and disengage the clutch. During this revolution of shaft 220 the latched actuating levers 2|1 drive their punch elements through the tape positioned over the die block 2l l, while the unlatched actuating levers rock idly about their ends held by the recesses 2 I5. The latches 222 are-selectively called into operation by related magnets 290 (only one shown in Fig. 8.), the armatures 292 of which are connected by rods 293 to the respective latches.

The tape is fed by a pin wheel 249 on a shaft 24|, the pins 243 of the wheel engaging feed holes 202 in the tapeformed by .a punch element 2| Il operated, upon each rotation of the eccentric 2|9 in a manner similar to the codel punch elements step by step by a pawl 241 pivoted to a reciprocating bar 268. The bar 248 has a yoke portion engaging over an enlarged portion of the shaft 220 and 'is reciprocated once for each revolution of the shaft 220 by a cam 249 bearing against a roller 250 journaled on thebar-248.

A cam shaft 296 is driven by a gear 294 on shaft 22|), which meshes with a gear 295 fixed to lthe shaft 296. The cam shaft 29B has mounted on it four cams 291 respectively operating pairs of contacts CI, C2, C3, and C4, the' timing of which is shown in Fig. 10.y

Operation Referring now to Figs. 9a and 9b the operation of the described units will be' explained in connection with the circuit diagram. l

. As mentioned hereinabove, the columns of data designations in the record cards must be sensed to determine the nature of the data designating perforations of each column, that is, to determine whether the punched data are alphabetical or numerical. It also was mentioned that like code combinations are employed for designating alphabetical and numerical characters in the' five-unit Baudot or Teletype code, thus, each group of data designating perforations of the same class, in the telegraphic control tape, must be preceded by a key code signal, such as a letters or figures signal.

In order to simplify the description to follow, assume that the first seven columns of the record card C (Fig. 4) to be sensed are perforated to represent: 129 921; also, that the card sensing unit is conditioned so that the rst column of the record card C is under the sensing brushes |2.

Upon closure of the floating cam contacts |49, a circuit is completed from conductor 30|) through said contacts |49, contact roll 9|, brush I2 sensing the l perforation, coils of translating relay RI and control relays RIS and R|4 to conductor 30|, thus, energizing the said relays.

At the same time, a circuit is also completed from conductor 300 through contacts |49, coils of lthe tape punch clutch magnet 280, and cam controlled contacts CI (closed at this time, see

Fig. 10) to conductor 30|, thus energizing the said clutch magnet. In this manner, shaft 220 of the tape punch is called into operation to rotate the associated eccentric 2|9 and cam elements of the related cam controlled contacts CI toC The transferred contacts R|3a to R|3c (Fig. 9a) exercise no controlling effects during numerical sensing operations; however, closure of contacts R|3d completes a circuit from conductor 300 through normally closed contacts Rlb, RIIb,

and Rl2b, said contacts Rl3d, normally closed contacts RiBa, and coil of relay RIB to conductor 30|, thus energizing the said relay.

` Contacts Rlsa are opened to insure an open circuit to the escape magnet 40 of the sensing unit; contacts Rltb are opened to insure an open circuit to coil of relay RI1; contacts Rld are closed to complete a circuit from conductor 300 through said contacts Rld, coil of relay RIS to conductor 39|, thus, energizing the said relay and causing contacts R|9a to R|9e to betransferred.

'Ihe said transferred contacts connect the 1," 2, 4" and 5 punch magnets 290 directly to cam controlled contacts C4. magnet 290 is connected to contacts Rle, which are opened at thisY time during numerical sensing operations.

The .3 punch Upon closure of the said contacts C4, near the beginning of the punch cycle (see Fig. the 1, 2, 4 and 5" punch magnets 290 are connected to conductors 300 and 30| to energize the said magnets, thereby causing the ilguresl key signal perforations to be punched in the iirst transverse row of the telegraphic tape 200, as shown in Fig. 5.

Upon completion of punching the figures perforatlons, the cam controlled contacts C2 are closed, as indicated in Fig. 10, tending to establish a circuit to the escape-magnet 40 to advance the next column of the card to the sensing brushes l2; however, due to the said open contacts RIGa, a circuit cannot be completed to the said magnet, consequently, the first column of the card remains under the said sensing brushes during a subsequent punch cycle, maintaining the said relays RI, R|3 and RII energized.

Shortly before the cam controlled contacts C2 are opened, the cam controlled contacts C3 are closed to establish a circuit from conductor 300 through the said cam contacts C3, the said closed contacts R|6c, coil of relay R|8, contacts R|5c to conductor 30|, thus, energizing the said relay. A holding circuit for relay Ri is immediately established from conductor 300 through normally closed contacts R25a and contacts Rl8b.

Opening of contacts Rla causes relay RIS to be deenergized and the related contacts RIBd to be opened, the latter contacts, in turn, causing relay RIS to be deenergized and restoring the said transferred contacts Riga to R|9e to theirl normal positions, as indicated in the circuit diagram.

As described hereinabove, near the end of each punch cycle, the tape feeding mechanism of the punch unit is operated to advance the tape 200 one step, thus presenting the next portion of the tape to be punched to the punch elements.

Upon completion of the punch cycle, cam controlled contacts CI are closed, as indicated in Fig. 10, to again cause the tape punch clutch magnet 280 to be energized, thereby releasing the said punch shaft 220 and initiating a second punch cycle. During this second punch cycle the tape is punched in accordance with the code combination for the sensed numerical data 1. It should be noted that relays RIB and RIS cannot be energized during this second punch cycle, due to the said opened contacts RiBa, thus the contacts RISa/-RISe remain in their untransferred positions during the remainder of the said second cycle. The said contacts- RISa-Rie now connect the individual punch magnets 290, by means of the related conductors 30G-3|0, to the individual conductors 3| |-3I5 (Fib. 9b), respectively, the latter being connected to groups of translating contacts of the translating relays RR,

RX, R0, and R|-R9, which groups of translating contacts are connected together in a cascaded relationship. Fig. 9b shows only a portion of the translating relay contacts and associated circuits sufficient to illustrate the principle of the present invention. The full diagram is given in the above mentioned Doty application Ser. No. 446,877.

Now, upon closure of cam controlled contacts C4, during the said second punch cycle, a circuit is completed from conductor 300 through the said cam contacts C4, conductor 305, contacts Rlb ar'idRic, and normally closed contacts RRe, RXd to contacts Rid and Rle, conductors 3H, 3|2, 3|3,3|5, respectively, conductors 306, 301, 300, 3|0, respectively, contacts R|9a, RISb, R|9c, Rl9e, respectively, and the 1, 2, 3, 5

the signal for the said numeral 2.

magnets 200 respectively, to conductor 30|; thus, energizing the said magnets and causing the'code designating perforations representing the numeral 1 to be punched in the second transverse row of the telegraphic tape 200, as indicated in Fig. 5.

After the said punching operation is completed, during this second punch cycle, the cam controlled contacts C2 are closed to energize the escape magnet 40, causing the next, or second, column of the card to be fed to the sensing brushes, by means of a circuit completed from conductor 300 through normally closed contacts R|5a and RiBa, said cam contacts C2 to escape magnet 4U and conductor 30|.

It will be recalled, that upon energization of thev escape magnet 40 and operation of the described escapement mechanism of the sensingl unit, the iioating cam contacts |49 are opened, until the'next column of the card is presented to the sensing brushes. Opening of contacts H9 causes the translating relay RI and control relays R|3 and RIB to be deenergized.

Upon closure of the said floating cam contacts another punch cycle (third) is initiated, due to the completion of the previously traced circuit to the punch clutch magnet 280 through the contacts M9 and CI. At the same time, a circuit is completed from conductor 300 through contacts |49, contact roll 9|, brush |2 sensing the 2. perforation, coils of translating relay R2 and control relays Ri3 and RH to conductor 30|, thus energizing the said relays.

Since the said second column of the record card C 'has numerical data punched therein, namely, the numeral 2 as assumed in the present example, it is not necessary to punch again the figures key signal in the tape preceding As mentioned hereinabove, whenever a group of data designations, representing all numerical or all alphabetical data, are arranged in successive columns on a record card, it is only necessary to provide one key signal preceding each group of numerical or alphabetical data designations on the telegraphic tape. In the chosen example, the first three columns of data on the record card are numerical, therefore, in translating and punching this data on the telegraphic tape, it is merely necessary to provide a single key signal, namely, the figures key, preceding the three transverse rows of perforations in the tape representing the numerical data sensed in the said three-successive columns on the card.

The suppression of repeated key signals is accomplished by maintaining the control relay R|0 energizedat all times during the sensing of a group of data designations ofthe same class. The holding circuit for relay R|8 is maintained through contacts R|8b until either of relays RIB or R25 is energized to open the contacts R|5c or R25a, in the previouslytraced holding circuit. As mentioned previously, contacts R|8a are held open, as long as relay R|8 is energized, to prevent energization of relay RIB and in turn RIB, thus maintaining the Rl 9ct-Rl 9e contacts in their normal indicated positions, whereby the tape vpunch ma nets 290 are connected directly to the variously onnected groups of contacts' of the translating relays.

Thus, upon closure of the cam controlled contacts C5, during the third punch cycle. the tollowing punch magnet circuits are established: from conductor 300 through the said cam contacts C5, conductor 305, contacts R2b, normally closed contacts RISa,

tively, and the 290, respectively, to conductor 30|; thus, ener= and cam contacts CI,

, viously traced,

closed contacts Rd. RRf and contacts R2c, normally closed contacts RXe and contacts Rd, conductors 3II, 3I2 and 3I5, respectively, conductors 306, 301 and 3I0 respectively, normally RISb, and RI9e, respec- 1," 2, and 5 punch magnets gizing the said magnets and causing the code signal perforations representing the numeral 2 to be punched in the third transverse row of the telegraphic tape 200,

After the said punching operation is completed, during this third punch cycle, the cam controlled contacts C2 are closed and cause energization of the escape magnet 40, as previously described, to present the next or third column of the card to the sensing brushes.

Upon closure of the floating cam contacts I49 the punch clutch magnet 280 is energized to initiate a fourth punch cycle as described hereinabove; also, as'described, a circuit is completed to the brush I2 sensing the 9 perforation to effect energization of the translating relay R9 and control relays RI 3 and RI4.

AUpon closure of the cam contacts C4, a circuit is completed through the normally contacts RRn, Rim, and contactsv R9b, and through normally closed contacts RXq and contacts R911, conductors 3I4, 3I5, conductors 309, 3I0, normally closed contacts RI9d, RI9e`and the 4 and "5" punch magnets 290, just as preto energize the said magnets to cause the code designation representing the numeral 9 to be punched in the fourth row of the'telegraphic tape 200, as indicated in Fig. 5. Whereupon, the escape magnet 40 is energized, upon closure of cam contacts C2, to present the next, or fourth, column of the card to the sensing brushes.

, Blank columna-To continue with the chosen example, it will be remembered that the fourth column of the record vcard is a blank column. Upon feeding the blank fourth column to the sensing brushes, and upon closure of the floating cam contacts |49, no circuits canbe completed to the translating and control relays, however, the circuit to the punch clutch magnet 280 is completed to initiate another (the fifth) punch lcycle, as previously described.

Since contacts RI4@ remain closed during this fth punch cycle, a circuit is completed as follows, upon closure of cam contacts C4: from conas indicated in Fig. 5. i

closed including a group of code ductor 300 through said ca'm contacts C4, said contacts RI4a, relay R25, the 3 punch magnet 290 to conductor 30|, energizing said relay and said punch magnet. `The said punch magnet causes a single perforation to be punched, in the 3 position, in the telegraphic tape 200, in the fifth row, as indicated in Fig. 5, which'is a space signal.

The energized relay R25 opens its contacts R25a, breaking the circuit of relay RIB and thus restoring the control circuits to the normal condition shown in Fig. 9a, with contacts RI8a closed and contacts Rlab open. Whichever class of character designation is next sensed on the record card will condition the control circuits to insert a key signal perforation of the tape, before the character signal itself is punched. In the chosen example, upon arrival of column 5 of the record card at the sensing brushes I2, and closure the tape clutch magnet 280 will beenergized-to of the floating cam contacts |49,

tion may be made -to be energized and the same'sequence will then be repeated as in the rst and second punch cycles, except that in the seventh punch cycle the "4 and "5 punch magnets, designating a "9, will be operated. The insertion of the figures key signal in the tape, before the "9" character signal, will cause the teleprinter to shift back to figures letters` case by the preceding space signal. The sensing of the 2 and 1 data designa-` tions in columns 6 and 7 of the record card will cause the punch to perforate the tape with 2 and 1 character signals, in the manner previously. described, without any further ngures key signals.

The behavior vof the apparatus upon sensing alphabetical character designations will not be described in detail, because the present invention is not concerned therewith; a description thereof will be found in the previously'mentioned Doty application, Serial No. 446,877.

While there have been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its opera- .by those skilled in the art, without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the' scope of the following claim.

What is claimed is:

In an apparatus controlled by records ha ving two different types of characters, such as numerical and alphabetical, represented thereon by positioned code points which are distinctively positioned for each character; record reading means including means to sense the code representations of the characters successively; means elements operable singly and in various combinations to manifest code signals; translating means controlled by said reading means selectively -to operate said code elements, to manifest code signals of a second code in which each of certain signals representing diiferent characters of one of said types also represents a single characterpof the other type; supervisory means controlled by said sensing means and differently responsive to the record code representations of the two diterenttypes of characters; designating means controlled by said superviso means to operate said code elements to manifest either of two different key signals designating, respectively, thetwo dilerent types of characters; normally inoperative disabling means conditioned by said designating means to prevent a second operation of the latter to operate said `code elements to manifest the same key signal twice in succession; means responsive to the sensing of a blank on the record to operate said code elements to manifest a particular signal; and means operated in conjunction with said last mentioned means to restore said `disabling means to its normal inoperative condition,

CHARLES R. DOTY.

record card. The

case, after being unshifted to 

